I have recently begun using a medium sized Peter Pugger tile extruder machine, with an accompanying tile cutter table. I have been working to get straight extrusions with usable edges that dry to tiles with straight sides with 90 degree corners. I have had problems with the edges expanding outwards when drying so that I get arcs for edges instead of straight lines. (I am making tiles 9" square, wet-clay size.)
I know there are fluid dynamics issues with extruders that need to be compensated for with die design and maybe extrusion speed. Any advice on these or other possible issues would be welcome.
In addition, Peter Pugger has recently introduced a "manual tile cutter table." This is a neat concept with some practical issues. Wet clay does not flow across the plywood surface, even when oiled. I have developed a workaround which I will be happy to share if anyone has interest, and would be interested in sharing any other ideas (like the oil I use) if there is some value in doing so.
Thanks to all!